DocuSign shares zoomed more than 30 percent higher on Friday in the stock's first trading day on the Nasdaq.

Shares opened at $38 apiece, well above the $29 Thursday night pricing. The stock held gains through the day, closing at $39.73, up 37 percent.

The company, which makes software for digitally signing documents, raised $629.3 million in its initial public offering after pricing shares at $29. The move provides another proof point for continuing market interest in new technology stocks.

DocuSign's S-1 filing, which initiates the process of going public, appeared online on March 28. On April 17 the company revised the filing and estimated that its stock would price between $24 per share and $26 per share. And on Wednesday DocuSign revised it again and bumped up the range to $26 per share to $28 per share.

The company is trading on the Nasdaq under the ticker symbol "DOCU."

DocuSign said Thursday that it sold 21.7 million shares of its stock and now has 152.1 million outstanding shares, giving the company an implied valuation of $4.41 billion, above the $3 billion valuation that it reportedly picked up in 2015.

CEO Dan Springer told CNBC that while the company has a history of operating losses, he was feeling "pretty good" about the company's future profitability. The IPO money will be spent on doing the same things the company has done thus far, including "major investments" infrastructure and security, and in making the company a "the best place to work" to attract top talent, Springer told CNBC's "Squawk Alley" on Friday. He also said there's a huge opportunity for DocuSign in international expansion.

San Francisco-based DocuSign was founded in 2003. Its primary competitor is Adobe.

DocuSign is the eighth cloud or enterprise software as a service company that has sought to go public this year, Rohit Kulkarni of SharesPost wrote in a blog post on Thursday. Ceridian, Dropbox and Zuora are among the tech companies that have gone public in recent weeks, and SmartSheet went public this week alongside DocuSign.

Lyft, Slack, Pinterest and Postmates have already filed. Uber and Airbnb are expected to join before the end of the year. But even with the big names and big valuation initial public offerings in 2019, there is evidence the traditional IPO is dying.

Battery start-ups are raising millions of dollars from VCs and corporations such as Volkswagen to commercialize their breakthrough technologies. They believe their batteries are big improvements over the current lithium-ion batteries used by Tesla.